Clearblue Easy Fertility Monitor Test Sticks - 30 ct. For use with the Clearblue Fertility Monitor, the Clearblue Fertility Monitor Test Stick pack includes 30 individually wrapped test sticks. The majority of women who are trying to conceive will need 10 test sticks each cycle. Women with irregular or long cycles may have to use 20 test sticks each cycle. The Clearblue Fertility Monitor maximizes a woman's chances of conceiving a baby by identifying typically 3x more fertile days compared to traditional ovulation tests. This electronic, handheld fertility monitor tracks two key ovulation hormones to pinpoint 2 Peak Fertility days and 1-5 High Fertility days for most women. Sometimes referred to as an ovulation predictor or pregnancy calculator, the Clearblue Fertility Monitor is the most advanced way of tracking fertility, and the only non-invasive method that detects both LH and estrogen hormones. Clearblue is the #1 brand recommended by OB/GYNs. Typically identifies up to 6 fertile days.